Study of wavelength-shifting chemicals for use in large-scale water Cherenkov detectors

Study of wavelength-shifting chemicals for use in large-scale water Cherenkov detectors

Cherenkov detectors employ various methods to maximize light collection at the photomultiplier tubes (PMTs). These generally involve the use of highly reflective materials lining the interior of the detector, reflective materials around the PMTs, or wavelength-shifting sheets around the PMTs.

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Temperature and frequency dependent electrical transport in thiourea and tris (thiourea) copper (l) sulphate

The d.c. conductivity of thiourea and tris (thiourea) copper sulphate have been measured as a

function of temperature, including their phase transition temperatures. The thermal activation energy values obtained showed that the two compounds behaved as semiconducting materials.

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The temperature dependent electrical transport in biphenyl derivatives

The temperature dependent electrical transport in biphenyl derivatives

The d.c. electrical conductivity measurements as a function of temperature of 4,4-dibromobiphenyl (DBrBP), 4,4-dichlorobiphe

nyl (DClBP) and 4,4-dimethoxybiphenyl (DMOBP) compounds have been carried out. 

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Electrical transport as a function of temperature in urea and cobalt (III)-urea complex

Electrical transport as a function of temperature in urea and cobalt (III)-urea complex

The temperature dependence of the electrical conductivity, and the voltage±current

dependence of urea and its cobalt solid complex were determined. The values of the thermal

activation energies indicate that the two compounds behave like semiconductors

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Synthesis, spectral and magnetic studies of novel transition metal complexes

Synthesis, spectral and magnetic studies of novel transition metal complexes of Cu(II), Ni(II), Co(II) and Zn(II) of Schiff base ligands derived from sulfa drugs and aroylhydrazone of nicotinic hydrazide Badr A. El-Sayed, Sultanah A.S. Ali  and Amirah S. Al-Attas, submitted to Spectrochimica Acta part A (2010).

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Conferences

   Conferences

• B.A. El-Sayed, M.M. Abo Aly and G.M. Attia, “Vibrational and Electronic Studies on Salicylaldazine Transition Metal Complexes”, Twelfth International Conference on Fourier Transform Spectroscopy, Waseda University, Tokyo, Japan, August 22–28 (1999).

·         M. M. Abo Aly, B. A. El- Sayed and A.M. Hassan, “Vibrational Spectra of Benzaldazine and Salicylaldazine Complexes with Zn(II) and Fe(II) Ions”.  The first International Conference of Advanced Vibrational Spectroscopy (ICAVS-1), Turku– Finland, August 19-24 (2001).

·         M.M. abo Aly, B.A. El-Sayed and M.M. Metwally, “Vibrational Spectra of Thiophene Azine, Furan Azine and Acetophenone Azine, XXVI European Congress on Molecular Spectroscopy, Villeneuve d’Ascq, France, Spetember 1-6 (2002).

·         A.A. Amaar, B.A. El- Sayed, S.A. El-Sayad, “Structural and Optical Studies on o-OH Acetophenone Azine Thin Film”,  The XXIII Conference on Solid State Science and Workshop on Physics and Application Potential of Functional Ceramic Thin Films, Egyptian Society of Solid State Science and Applications, Sharm El-Sheikh, Sinai, Egypt, 28 September-2 October (2002).

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Publications

·           Synthesis, spectral and magnetic studies of novel transition metal complexes of Cu(II), Ni(II), Co(II) and Zn(II) of Schiff base ligands derived from sulfa drugs and aroylhydrazone of nicotinic hydrazide Badr A. El-Sayed, Sultanah A.S. Ali  and Amirah S. Al-Attas, submitted to Spectrochimica Acta part A (2010).

·         Spectroscopic characterization on transition metal complexes of malonylhydrazone and 4,6-diacetylresocinol.  B. A. El-Sayed, Adel A.A. Emara, Salah M. Shaaban and Mohamed  M. Abo-Aly, Transition Metal Chemistry, In press (2010)

·         Template and non-template synthetic approaches of some aromatic azomethine transition metal complexes, B. A. El-Sayed and Adel A.A. Emara,  Journal of Coordination Chemistry, Accepted for publication (2010).

·         Synthesis, spectroscopic characterization and thermal behavior on novel binuclear Transition metal complexes of hydrazones derived from 4,6-diacetylresorcinol and xalyldihydrazine. Adel A. A. Emara, Badr A. El-Sayed, and El-Sayed A. E. Ahmed, Spectrochimica Acta part A 69 (2008) 757 – 769

·         The Temperature Dependent Electrical Transport in Biphenyl Derivatives. M. M. Sallam, B. A. El-Sayed, and A. A. Abdel-Shafi Current Applied Physics 6 (2006) 71-75

·         Structural and Electrical Conductivity  Studies on 1,4 Bis(p-Methoxybenzilidine) (SB) and its Diphenyl Phosphine Derivative(OPSB) R. S. Farag, B. A. El-Sayed, M. A. El-Nawawy, and S. M. Shaaban, Phosphorus, Sulfur, and Silicon, 179: 1923-1931, (2004).

·         Electrical transport as a function of temperature in  hexacyanoferrate Complexes.       B. A. El- Sayed, A. A. Shabana, M. M. Abo-Aly and M. M. Sallam  - Journal of Materials Science: Materials in Electronics 14 (2003) 27-31.

·         Vibrational  and electronic studies on some metal thiourea complexes. G. M. S. El-Bahy , B. A. El-Sayed, A. A. Shabana Vibrational  Spectroscopy  31 (2003) 101-107

·         Direct Hydrochloric Acid Leaching of an Egyptian Ilmenite Ore for Production of Synthetic Rutile.  I.A.Ibrahim, M.H.H.Mahmoud, A.A.Afifi, and B. A. El-Sayed Hydrometallurgy  Vol. 1, p.555-564(2003).

·         Synthesis and Structural Study of the ligand o-OH acetophenone azine and its  Cu (II), Ni (II), Co (II) and Zn (II) Complexes. B. A. El- Sayed, M. M. Abo Aly, A. A. Emara, and S. M. Khalil Vibrational Spectroscopy 30 ( 2002) 93-100

·         Vibrational Spectra of Benzaldazine and Salicylaldazine Complexes with Zn (II) and Fe (II) Ions.  M. M. Abo Aly, B. A. El- Sayed and A.M. Hassan Spectroscopic Letters,35 (3),337-348 (2002). It has been presented in the first Conference of Advanced Vibrational Spectroscopy (ICAVS- 1) (TURKU – FINLAND)  (2001).

·          Physicochemical Investigation on The Complexes of Co (II), Ni (II) and Cu (II) with Aminocyclodiphosph. (V) Azane Derivative. I.M. Abdellah, B. A. El- Sayed, M.M.El-Nawawy and A.M. El-Aghaze phosphorus, Sulfer  and Silicon,  (2002), Vol. 177: 2895 – 2906.

·          Structural and Optical Studies on o-OH Acetophenone Azine Thin Film. A.A. Amaar, B. A. El- Sayed, S.A. El-Sayad,  J. Materials Science 37 (2002) 3255-3260.

·         Synthesis, Vibrational, and Electronic Studies of Salicylaldazine Transition Metal Complexes.B. A. El- Sayed , M. M. Abo Aly and G. M. Attia Synthesis and Reactivity in Inorganic and Metal Organic Chemistry , 31 No. 9 ( 2001) 1565-1576.  

·         Temperature Dependence of The Electrical Conductivity in Schiff Base of 2-NH2-3-CN-4,5,6,7-T.H.Benzo [B] Thiophene and its Diphenylphosphine Derivative. B. A. El- Sayed, E. M. Abd Ellah, M. A. El- Nawawy, and F. M. Al-Azab, Phosphorus, Sulfur and Silicon, 157 (2000) 57-65.

·         Temperature and Frequency Dependent Electrical Transport in Thiourea and Tris (Thiourea) Copper (I) Sulphate.  B. A. El- Sayed, and M. M. Sallam   Journal of Materials Science: Materials in Electronics 10 (1999) 63-66.

·         Temperature Dependence of the Electrical Conductivity in 4,4/Bis (2-Thenylidene-amino) Biphenyl and 4,4/Bis (Thenylidphenyl-Phosphinyl- Methyleneamino) Biphenyl Compounds.  B. A. El- Sayed, M. A. El- Nawawy, E. M. Abd Ellah, and R. S. Farag  Journal of Materials Science 34 (1999) 2715-2718.

·         Vibrational and Electronic Studies on Salicylaldazine Transition Metal Complexes. B. A. El- Sayed , M. M. Abo Aly and G. M. Attia, Proc. Of Fourier Transform Spectroscopy “Twelfth international conference” Tokyo, Japan, August 1999.

·         Electrical Transport as a function of Temperature in Urea and Cobalt (III)-Urea Complex. M. M. Sallam, B. A. El- Sayed, and S. M. Shaaban Journal of Materials Science: Materials in Electronics 10 (1999) 479-482.

·         Temperature Dependence of The Electrical Conductivity of fresh irradiated Tetrachloro-P-Benzoquinone. B. R. El- Ezaby, B. A. El- Sayed, S. M. Abdel Wahab, and A. M. El- Refae Asian Journal of Physics, 8, No.1 (1999) 52-56.

·         Vibrational Spectra of Some Arylaldehyde Azines. M. M. Abo Aly, and B. A. El- Sayed, Canadian Journal of Analytical Sciences and Spectroscopy,43 No. 3 ‎(1998) 76-80.

·         Temperature Dependence of the Electrical Conductivity of 4-(2-OH-4-CH3 Phenyl Azo)-Antipyrine and its Copper Solid Complex. B. A. El-Sayed, M. M. Sallam, M.F. Ishak, and M. S. Antonious Materials Letters 34 (1998) 280-284.

·         Temperature Dependence of the Electrical Conductivity of Salicylaldehyde Hydrazone and  its Transition Metal Complexes.  B. A. El- Sayed, S. M. Shaaban, M. M. Sallam, and A. A. Emara  Journal of Materials Science Letters 15 (1996) 883-885.

·         Temperature Dependence of the Electrical Conductivity of Selenous Acid and its Transition Metal Selenites. B. A. El- Sayed, A. A. A. Emara, F. S. M. Abd El-Hameed, and S. M. Shaaban  Materials Letters 27 (1996) 247-252.

·         Temperature Dependence of the Electrical Conductivity of Oxamide, Dithio-Oxamide And Biuret  B. A. El- Sayed, S. M. Shaaban, A. M. Hassan, and A. A. Shabana  Materials Letters 27 (1996) 65-69.

·         Temperature Dependence of the Electrical Conductivity of Some Selected Azine Compounds. B. A. El- Sayed, S. M. Abdel Wahab, A. M. El- Refae, and K. A. Darwish,  Journal of Materials Science Letters 15 (1996) 561-563.

·         Deactivation Channels of Multidimensional S1 State of Some Laser Dyes. L. F. Ismail, M. S. Antonious, B. A. El- Sayed and M. S. A. Abdel- Mottaleb, Proc. Indian Acad. Sci.(Chem. Sci.), 107, No.6 (1995) 735-742.

·         Temperature Dependence of the Phase Transitions of Benzaldazine and its O-, M- And P-Nitro Derivatives. B. A. El- Sayed, M. A. Ahmed, S. M. Shaaban, and A. A. Shabana,  Thermochimica Acta 256 (1995) 413-418.

·         Excited State H-Bonding Complexes of Coumarin Dye Derivatives. M. M. Abo Aly, B. A. El- Sayed, M. M. H. Khalil, and M. S. A. Abdel- Mottaleb,  Spectrochimica Acta 50A, No.14(1994) 2395-2396.

·         Temperature Dependence of the Electrical Conductivity of Urea and Thiourea. S. M. Shaaban, B. A. El- Sayed, A. A. Shabana,and A. M. Hassan,  Materials Letters 21 (1994) 255-258.

·         Electrical and Spectral Studies of Modified Solid Semiconductors.  S. M. Shaaban, M. M. El-Desoky, B. A. El- Sayed and M. B. Sayed,  Journal of Materials Science: Materials in Electronics 4(1993) 43-46.

·         Phase Transition of Some Selected Azine Compounds. M. M. El-Desoky, S. M. Shaaban, M. A. Ahmed, H. H. Higazy and B. A. El- Sayed, Thermochimica Acta, 197 (1992) 357-361.

·         Temperature Dependence of the Electrical Conductivity Of Salicylaldeazinate Metal Chelates. B. A. El- Sayed, M. M. El-Desoky, S. M. Shaaban,and M. B. Sayed Journal of Materials Science: Materials in Electronics 3 (1992) 124-126.

·         Photophysics and Dynamics of Coumarin Laser Dyes and their Analytical Implications. M. S. A. Abdel- Mottaleb , M. S. Antonious , M. M. Abo Aly, L. F. Ismail, B. A. El- Sayed, and A. M. K. Sherief  Proc. Indian Acad. Sci.(Chem. Sci.), 104,No.2 (1992) 185-196.

·         The Photoconductivity of Benzaldazine and its o- and p-Hydroxy Substituents. S. M. Shaaban, B. A. El- Sayed, M. M. El-Desoky, and H. H. Higazy, Journal of Materials Science: Materials in Electronics 2 (1991) 133-136.

·         The Electrical Conductivity of Some Azine Compounds. B. A. El- Sayed, S. M. Shaaban, M. M. El-Desoky, and M. A. Ahmed, Journal of Materials Science: Materials in Electronics 2 (1991) 11-13.

·         The Electrical Conductivity of Benzaldazine and its o-, M- and p-Hydroxy Substituents. M. A. Ahmed, B. A. El- Sayed, M. M. El-Desoky, and S. M. Shaaban Thermochimica Acta 168 (1990) 25-30.

·         Electrical and Spectral Studies of Solid Organic Semiconductors-I. Structural  Interpretation of Promoted Conductivity of Salicylaldazine. B. A. El- Sayed, M. M. El-Desoky, S. M. Shaaban, and M. B. Sayed. Electrochimica Acta, 35,No.11/12 (1990) 1987-1988.

·         Photophysics and Dynamics of Rigidized Coumarin Laser Dyes. M. S. A. Abdel- Mottaleb, M. S. Antonious, M. M. Abo Aly, L. F. M. Ismail, B. A. El-Sayed, and  A. M. K. Sherief,  Journal of Photochemistry and Photobiology, A: Chemistry, 50 (1989) 259-273.

·         Fluorescence Properties and Excited State Interactions of 7-Hydroxy-4-Methylcoumarin Laser Dye.  M. S. A. Abdel- Mottaleb, B. A. El- Sayed, M. M. Abo Aly,and M. Y. El- Kady,  Journal of Photochemistry and Photobiology, A: Chemistry, 46 (1989) 379-390.

·         Fluorescence Properties of Some Substituted Acyclic Azines.  M. M. Habashy, M. S. Antonious B. A. El- Sayed , and M. S. A. Abdel- Mottaleb,  Journal of Luminescence 36 (1986) 173-176.

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